Improvement in hydraulic elevators



J. G. WILLARD. Hydraulic Elevator.

No. 201,078. Patented March 5, I878.

I). PETERS. PHOI'O-LITHOGRRPHER, WASHINGYON D C UNITED STATES PATENT OFFICE.

JOEL G. "WILLARD, OF NEW YORK, N. Y.

IMPROVEMENT IN H YDRAULIC ELEVATORS.

Specification forming part of Letters Patent No. 201,078, dated March 5, 1878; application filed June 27, 1877.

To all whom it may concern:

Be it known that I, JOEL G. WILLARD, of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Hydraulic Elevators; and I do hereby declare that the following is a full and exact description thereof, reference being bad to the accompaclosed most usually by the pulling of a rope or small cable that runs through the car.

As heretofore made, the organization has been such that by a too rapid or quick movement of the rope or cable by the conductor, the valves would be so suddenly closed or operated as to cause a heavy momentum or shock upon the apparatus by the too sudden stoppage of the moving column of water, which shock has not only been objectionable to the occupants of the car and building, but has also subjected all the parts of the machine to severe and dangerous strain, and all the joints of the piping and other water-receptacles to such shock as to cause constant leakage in said joints.

I have successfully overcome these serious objections and difficulties by the employment, in connection with the valve and the usual cable operated by the car-conductor, of a gear mechanism, by which the movement of the cable to be transmitted to the valve-stem is so slowed downthat no matter how suddenly the car-attendant may move the rope, the valve will be moved so slowly that no perceptible shock can possibly be produced, and that so no undue strain or concussion of the hydraulic column can be produced to overstrain the pipe-joints or other portions of the elevator apparatus and my invention, therefore, consists in the combination, with the actuating rope or cable and the valve for regulating the supply of water-pressure, of means, substantially such as hereinafter described,

whereby I am enabled to prevent any too sudden movement of the valve, and consequent concussion, by the hydraulic columns.

To enable those skilled in the art to make and use my invention, I will proceed to more fully describe the construction and operation of my improved valve-gear, referring by letters to the accompanying drawin gs,in which- Figure 1 represents, in elevation, so much of the supply-pipe, valve-chest, and cable of a hydraulic elevator as is necessary to illustrate my invention, and shows the application thereto of my valve-gear mechanism. Fig. 2 is a side view of the parts shown in front elevation at Fig. 1, and Fig. 3 is a detail section at the line y y of Fig. 1.

In the several figures the same part will be found designated by the same letter of reference.

A is the supply-pipe, leading to the cylinder (or one of the cylinders) of a hydraulicelevator apparatus; and B, the valve chest or chamber, in which. is arranged the valve that regulates the passage through the pipe A of the water-supply. O is the usual rope or handcable that extends up to and through the car, and which the attendant or conductor pulls on in one direction or another to open and close the valve, and thus apply or cut off the hydraulic pressure which acts as the motive power to drive the car. This rope I pass round a sheave or pulley, D, the shaft E of which is mounted to turn freely in a fixed bearing properly arranged in the stand F, (or is arranged otherwise, as may be convenient.) Keyed to the shaft E is a driving spur-pinion, G, which meshes or engages with the teeth of a sector-gear, H, the arm I of which is fastened at its lower end to the protruding end of the arbor or stem J of the valve.

The sector H is shown as steadied or guided at its upper part by a flange or feather, Z, passing behind a holder-plate, m, fastened to the stand F. This detail of construction is best seen at Fig. 3, and may, of course, be va ried at the pleasure of the engineer or builder,

its only objectbeing to afford sufficient rigid-V V itytothe Working parts, and keep them properly' in gear.

' V Now, it will'be seen and understood from V V the drawings, and thedescription so far given 7 V of the mechanism shown,that its operation'is as follows, viz: By pulling the rope O inone' direction or the other, the pulley D, with its spur-pinion G, will berotated correspondingly,

V and that, by the rotating of the pinionG, the

toothed sector H will be vibrated in one dis in the chest will be opened or closed, (accord ing to the direction in which said arbor 'Jiis V V 7 turned and it will also be seen that it requires 7 every considerable throw or movement of the V toothed sector H to effect a sufficient movement of the'arbor'or stem J to openor close 7 r the valve, and that a'still greater extentof' motion of the pulley Drand rope (lisre V V quired forthis movement, since the propor tions of the pulley, pinion, andseetor are such 7 1 that for a stroke of thelatter the former must: i

wind or unwind a length of rope equal to "nearly'twice the length of the stroke of said sector.

pying much time) to produce a suflicient movedne strain on the parts or vator apparatus. 4 r 7 my invention, or materially changing the iconor mechanism shown and described r 7 What I claim as new, 7 by Letters Patent, is-:-V V V r as and for the purpose described. r

r r V Q QE ei-WI PABQiL-s-i 'In presence of- V '7 JACOB FELZBEL,

J No. J. BONNER ':':Thus,itwi1l'be seen, the'rope in the car mustbe pulled a considerable distance (occu ment in the arbor'J' to give the'valveaeom- V plete movement, and therefore the valve :can'" 11015136 closed so quickly as to cause anyinn 3 joints of the ele' V The minnti'm of construction may, of course, 7 V

bevaried' without departing from the gist of struction ormodeof operation of the machine and desire to secure 4 The combination, with the valve and the 'rope,or its equivalent, extended 'torthe'car, a r

of :apinionoperatedbythe movement of the V ,7 r

' rope and asector driven by said pinion, and 9: 3- l having its axis of motion coincident with the 7 center of oscillation of thevalve, substantially V V V V 'In'testirnony whereof I have hereuntoset' 7 my hand and seal this25th day of June, 1877. 

